Or, they just thought no one would notice. How many people would have ever seen one?I suppose the props department had it donated when the BBC scrapped a 200 and didn't have any idea which way was 'up' - always a problem in space.
The Death Star control panel used to destroy Alderaan, including the lighted switches and that lever that is pulled are, I was told on good authority, TV studio gallery desk controls for lighting and vision control, and for fading or mixing between cameras. I used to know someone who trained new cameramen there, and I visited the BBC studios at White City, London with him in the mid-1980's. It did look the same to me.
Here is the Star Wars sequence:
And here is a photo of a similar, but smaller mixing desk, in another but very similar BBC studio taken in 1981, from this website: history of television studios in London